20. Runners and Cyclists III An experiment was conducted involving 10 healthy runners and 10 healthy cyclists to determine if there are significant differences in pressure measurements within the anterior muscle compartment.8 The data—compartment pressure, in millimeters of mercury (Hg)—are reproduced here:

For each of the three variables measured in this experiment, test to see whether there is a significant difference in the variances for runners versus cyclists. Find the approximate p-values for each of these tests. Will a two-sample t-test with a pooled estimate of 2  be appropriate for all three of these variables? Explain.

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Condition Runners Standard Cyclists Standard Mean Deviation Mean Deviation Rest 14.5 3.92 11.1 3.98 80% maximal O, consumption 12.2 3.49 11.5 4.95 Maximal O, consumption 19.1 16.9 12.2 4.47